Malicious PDF — malware analysis report

Static analysis result for SHA-256 75fda1f1c2afe8c8…

MALICIOUS

PDF

77.5 KB Created: 2021-04-08 08:14:46 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-24
MD5: 05bcea0a378d8ffad373492484830ad7 SHA-1: 29956859c668540cb50c9e62cec321a9eab58067 SHA-256: 75fda1f1c2afe8c8116e81b57208ef5745832e96694b742b863d107572ff8f16
244 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF document contains numerous links to external websites, many of which are hosted on disposable domains or known redirector infrastructure. The document body, though heavily obfuscated, appears to contain text related to a TV show review, likely serving as a lure. The presence of multiple malicious redirector links and a high ML classifier score strongly indicate a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL https://dafemum.ru/strik?utm_term=the+undoing+episode+1+review+guardian In PDF document text
    • https://cdn.sqhk.co/ximegawaso/hb5O3nD/zusalepeforusibuda.pdfIn PDF document text
    • http://begemot.space/pevinetjwwlg.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4474727/normal_605998fd5d245.pdfIn PDF document text
    • https://cdn.sqhk.co/josozudibud/hcfhaQA/87817547140.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4448991/normal_5fea252e7805d.pdfIn PDF document text
    • https://cdn.sqhk.co/wisulekekij/hcqE87q/soccer_ball_3d_illusion_lamp.pdfIn PDF document text
    • https://tawemitanenu.weebly.com/uploads/1/3/4/4/134474066/fifajog_kukuz_watuju.pdfIn PDF document text
    • http://ludshop.xyz/carter_yf_carburetor_manualb74m0.pdfIn PDF document text
    • https://cdn.sqhk.co/livaxipovage/iihisPF/virus_protection_for_ipad_mini.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4464080/normal_603ddde7cb116.pdfIn PDF document text
    • http://my-favshopd.online/64508000347a7rae.pdfIn PDF document text
    • http://artistichomesolutions.com/brindisireport_ultime_notizie_oggid9hal.pdfIn PDF document text
    • https://kapelivoxiri.weebly.com/uploads/1/3/4/0/134040857/mabebogonubu_xuwejaribona_zotoperobedaj_xigilomedep.pdfIn PDF document text
    • https://puxosuloboja.weebly.com/uploads/1/3/4/6/134677226/genetofetaxavo-vowawu.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://45180a89-8b92-4d54-a4c6-cdf0ad6af3c7.filesusr.com/ugd/2b98a3_57c79f153df24f13af324295a49302a2.pdf?index=trueIn PDF document text
    • https://8ac5c8e1-9174-427d-95c2-90bebb9f105a.filesusr.com/ugd/44b221_c7cab319a1e2470cb8366d24db02d519.pdf?index=trueIn PDF document text
    • https://30c74dc1-c3f2-4e71-8253-1ec84f3b94e1.filesusr.com/ugd/b8c6fa_ce799a521580419fb8273931d2e4b464.pdf?index=trueIn PDF document text
    • https://1dab3517-3db0-43ff-9fd6-b65b51f65b60.filesusr.com/ugd/565485_d5b86573b0834ad1a284035b3aef8f81.pdf?index=trueIn PDF document text
    • https://7f993087-45f6-41f4-96e5-9dcaca18fb91.filesusr.com/ugd/9a92dd_6a75e261d5f04c98a9837e05df2d799c.pdf?index=trueIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ed03.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xED03 5344 bytes
SHA-256: 4ec18f156999ece6eb69fe86179bfd477be0e81de1ef300a415d762b8e8a51b3
font_01_sfnt_off0000ff43.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFF43 11580 bytes
SHA-256: 316889fb6c3bf49c10e38598e801846a384b1d88923b0394d19de252931fd32f